A NAS configured as a RAID array gives some redundancy Ken. In my situation, all my gear is in one place so if the house burns down I'm stuffed.
But failing that, my PCs are backed up to the NAS which then effectively stores two mirror images of the same thing aboard it. When either/any of the NAS drives fail (which has happened) you just replace the drive with a new one and the thing rebuilds itself.
The NAS cost about $500 but I do feel some sense of security with it. Naturally, we don't delete stuff off the PCs either so there's always effectively three copies of our information floating about.
I'm giving thought to mirroring my valued information to one of the cloud based repositories but haven't fully decided yet.
I also think it's important to decide on your recovery plan whilst your PC is working ok. Figure out your plan of attack for when you go to it one morning, turn it on and it's dead. What would you do?
Get your ideas together, actually create your ISO images, and do up some idiot instructions detailing how to put it back together.
Just my 2c - hope it helps
